He is the day that controls the day, and she is the night that controls the night. They are both gods, but they still can't compete with the destiny. "We are willing to be mortals, just to be able to accompany each other." Searching in the world, looking back and pursuing in various ways, but why are we still so unwilling and regretful. We are going to miss it after all. When we meet each other again, are we just a short distance apart or are we still distant strangers?